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Both Intel and AMD support virtualization in their modern CPUs. Intel introduced?(VT-x technology)?that previously codenamed “Vanderpool” on November 13, 2005,?in Pentium?4 series. The CPU flag for?VT-x?capability is “vmx” which stands for?Virtual?Machine eXtension.AMD, on the other hand,?developed its first generation of virtualization extensions under the codename “Pacifica“, and initially published them as AMD?Secure Virtual Machine (SVM),?but later marketed them under the trademark?AMD Virtualization, abbreviated?AMD-V.There two types of the hypervisor. The hypervisor type 1 called “bare metal hypervisor” or “native” because it runs directly on a bare metal physical server, a type 1 hypervisor has direct access to the hardware. With a type 1 hypervisor, there is no operating system to load as the hypervisor.Contrary to a type 1 hypervisor, a type 2 hypervisor loads inside an operating system, just like any other application. Because the type 2 hypervisor has to go through the operating system and is managed by the OS, the type 2 hypervisor (and its virtual machines) will run less?efficiently?(slower) than a type 1 hypervisor.Even more of the concepts about Virtualization is the same, but you need different considerations in?VT-x?and?AMD-V. The rest of these tutorials mainly focus on?VT-x?because Intel CPUs are more popular and more widely?used. In my opinion, AMD describes virtualization more clearly in its manuals but Intel somehow makes the readers confused especially in Virtualization documentation. ................
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